“The sell-off isn’t surprising, since several major Apple suppliers — including Cirrus Logic, Qorvo, and Lumentum — all recently slashed their guidance, which suggests that Apple’s iPhone shipments (have) peaked,” Leo Sun, a tech and consumer goods specialist at The Motley Fool, told CNBC in an email.

The Apple suppliers’ declines came amid a wider rout in Asian technology companies on Thursday that followed the arrest of Huawei’s CFO in Canada.

Beyond the cutting of suppliers’ guidance, Sun said many questions surrounding the U.S.-China trade dispute “remain unresolved, with both sides offering conflicting versions of the agreement” that was made last weekend between the countries’ leaders at the G-20 summit in Argentina.

Beyond that, he said: “The flattening (and potentially inverting) yield curve in the US bond market also strongly indicates that the economy is slowing down — which will throttle demand for chips across multiple industries.”

Apple’s stock was not trading on Wednesday as the U.S. stock markets were closed in honor of former president George H.W. Bush. The Cupertino-based tech giant saw its shares fall about 4.40 percent on Tuesday after HSBC downgraded the company to hold from buy and cut its 12-month price target to $200 from $205.

“Apple’s iconic hardware unit growth is broadly over for now,” HSBC analysts said in the note.

“Revenues are only supported by higher selling prices and by the development of services. Flat unit growth has hit Apple’s share price and incidentally its key suppliers. What has made the success of Apple, a concentrated portfolio of highly desirable (and pricy) products is now facing the reality of market saturation,” they said.